The Sensex at the Bombay Stock Exchange was trading 38 points in red at 18,656 a short while ago. Earlier Sensex declined by over 86 points in early trade today as funds and retail investors preferred to book profits after yesterday's gains. The 30-share barometer, which had gained 21 points, fell to 18,608.The Nifty at the National Stock Exchange shed 8 points to 5,665.